I have a 6.5HP, OH valves Harborfreight small engine. I had it for about 3 years or so. Did not get much usage but when I used it always started and ran good. Just recently, I tried to start it but it did not work. It has been a while since it ran, and I hate to say this, but I neglected to drain the gas before the winter. Consequently the carburetor was gummed up. So I removed it and soaked it for 3 days, then blew compress air into every fuel passage several times… and still did not work. Obviously the fuel is not getting into the cylinder.
When applying a squirt of carb cleaner, tries to start for few revolutions. There is a good spark out of the plug and there is plenty gas in the bowl. If tries to start with a squirt, I assume the valves are okay.
Either I am overlooking something or the carb needs to be replaced.